hey mate, stick with the stock one best option.
plus have you tried to search the forum? theres kezillion thread like this..
http://www.skylinesaustralia.com/forums/Pl...amp;hl=best+bov
http://www.skylinesaustralia.com/forums/Bo...amp;hl=best+bov
http://www.skylinesaustralia.com/forums/BO...amp;hl=best+bov lol
http://www.skylinesaustralia.com/forums/Bo...amp;hl=best+bov
etc etc